it creates a whole different environment, a tropical environment out of the super cold desert, high desert. >> so the house is a jungle? >> is 50% a jungle. we just harvested bananas. this is talapia. you can fish here. my a-year-old grandson just caught a fish here and like 30 seconds. we grow protein. we have chickens out there. the idea with this is to show you can produce food enough to stay alive in your own home. >> what is in these pillars? >> this is just holding up this chamber appear that will be a hot tub. >> what are these materials? >> they are beer cans late in cement. beer cans and bottles. >> wide beer cans and bottles? to they are indigenous tand entire planet. this stays this temperature year-round a matter what. >> this is a warm, cool, moist -- >> in the wintertime, it feels warm, and in the summer, ifill school. the interior walls, most of them are tires. >> wide tires? >> they are indigenous to the entire planet. when you beat dirt into them, they hold temperature and stabilize the temperature, basically. so all of the back walls are made of tires? where do you get th